120313_wayne mackey case study 1000 home challenge

Mackey Deep Energy Reduction Case Study

Chambersburg, PA

Wayne Mackey

March 13, 2012 1

The 5th home in

North America to

officially meet the

Thousand Home

Challenge!

2

• 33-year-old home

• All-electric

• 5,343 heating degree

day (HDD) climate

• 2,500 ft2 (finished floor area)

• Full basement (1/2 finished)

2007-08 Energy Upgrades

New SEER-18 two-stage heat pump (Sept ‘07)

CFL or LED bulb replacements

New high-performance kitchen appliances (Dec ‘08)

40% energy reduction - enough to counter anticipated rate increases...

3

Then - The Unexpected

Severe hail storm with damage to home + $ insurance settlement

Loss of large tree in south-facing back yard + $ incentives for solar

equals

An opportunity for a much deeper reduction in energy use & CO2!

4

House with

siding

removed; ¼”

Thermo-ply

was original

sheathing –

Significant

gaps at

seams due to

shrinkage.

Home’s energy performance was enhanced by adding

insulation under the new siding & window replacement.

Attic insulation was increased to R-49 (April 2009).

5

Exterior wall

showing

original

Thermo-ply

with new foam

overlapping

seams of

original

sheathing

Original Thermo-ply

New 1” insulation (R-5)

Note: At the time of this upgrade, the product

literature cited a much higher R-value per inch.

6

Richard Sword (green hat)

was a craftsman, not a

contractor. His attention to

detail on the exterior

insulation contributed to

the energy performance of

the Mackeys’ home.

The cost of the one-inch

exterior insulation was

$3,800; the full siding job

cost $17,000.

7

11 existing thermo-pane

windows & 1 door were

replaced with high-performance

(U.18) triple-pane windows. 8

Front of Home as Work Begins

(windows, exterior insulation, siding)

9

Lots of NW facing windows.

Thank goodness for summertime shade!

10

Original door/side lites were built in

3 sections; new insulated door –

one big piece

11 Northeast Side Southwest Side

Front of house in progress. New 1” insulation board over old

Thermo-ply. New windows on first floor; second floor not

replaced yet. Siding removal, new windows, rigid

insulation & new siding carefully staged – one wall at a time. 12

Carefully fitting &

taping rigid

insulation.

Replacing windows &

siding simultaneously

provides opportunity

for proper drainage

plane. (www.buildingscience.com)

13

Beginning of 5.4 KW solar photovoltaic installation (Oct 2009).

Complete & operational on Dec 23, 2009 14

15

October 2009

Josh & Daniel Dec 23, 2009 – PV system

operational & certified! 16

January 2010 – Some snow melted

off the panel

The Mackeys paid to

have the snow cleared off

the PV panels once; They

let the sun melt it off from

then on. 17

355 days/year the

system produces

electricity. It does not

need to be a sunny

day.

March 9, 2008!

1st time in Borough’s history that PV produced enough electricity to power a house for 24 hours.

To date, there have been 10 months when the Mackeys have exported power to grid – producing more than they use.

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>10% Return on Investment (PV Installation)

Cost of PV

24,000 (after taxes & grants)

Solar Renewable Energy Credit (SREC)

2010 - $2,105

2011 - Banking them

Referral bonus from PV Installer

2010 - $2,000

2011 - $3,000

Produced to Date

13,910 kWh

Value of Electricity

~$1,500

Plus

8,000 miles/year without buying gas

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(Right) SMA Inverter –

AC/DC inverter - Display

shows daily production,

production to date, & CO2

reduced.

(Left) Box on left transmits signal

to SunPower to provide for

performance info on the web. 20

PV panel on house roof; solar

hot water system installed on

the garage roof in May 2010. 21

5.4 KW PV Array

Solar Hot

Water System

Solar thermal evacuated tube collector

22

23

Trees outside fence will provide

privacy screen, but will not

block solar systems

(Left) Gazebo (&

potting shed) –

enhances outdoor

living

Black box is the motor; also

displays incoming & outgoing

water temperatures.

Solar Thermal System

for Water Heating

Lifetime guarantee on

stainless steel tank!

24

Two Fujitsu ductless heat pumps

(indoor unit above) were

installed July 2011, providing

better control over comfort with

less energy.

25

New Chevy Volt purchased

in Sept 2011. Additional PV

panels added to provide

electricity needed to drive

8,000 miles/year on free

sunshine. 26

eMonitorTM Online results from 30 circuits – both instantaneous & over time!

27

28

Monthly Energy Use Over Time (kWh)

29 -1500

-1000

-500

0

500

1000

1500

2000

2500

3000

3500

4000

May

July

Sep

t

No

v

Jan

Mar

May

July

Sep

t

No

v

Jan

Mar

May

July

Sep

t

No

v

Jan

Mar

May

July

Sep

t

No

v

Jan

Mar

May

July

Sep

t

No

v

Jan

Mar

May

July

Sep

t

No

v

2006 2007 2008 2009 2010 2011

House kWh Use

PV kWh Production

Net kWhUse

Zero!!

New Heat

Pump Insulation

Windows PV

Solar

Thermal

Ductless

Heat Pumps

Beat 1000 Home Threshold by 3,500 kWh!

2,696

9,645

6,488

25,308

0 5,000 10,000 15,000 20,000 25,000 30,000

POST - NET kWh (With PV Credit - 6332kWh)

May 2010 - April 2011

POST - (No PV)May 2010 - April 2011

THC THRESHOLDOption B, Electric Heat

PRE-USE (2007)

Mackey Household Annual Energy Use (kWh) Pre & Post Compared to Threshold Allowance

Over 82% reduction

from 2007 energy use!

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THC OPTION B assumptions: 5,343 HDD; 2,500 ft2 FFA; 2 occupants;

electric heat; single-family detached

Online Resources

Case Studies

Project Planning Resources

Webcasts Recordings (mini-splits, water heating, dense-pack insulation)

Access to Resources/Links

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www.ThousandHomeChallenge.org

Register for an upcoming Intro to the 1000 Home Challenge webinar:

March 14, 1-2:30 PM (Eastern) 10-11:30 (Pacific)

http://thousandhomechallenge.com/join-us.

Join the Home Energy Pros THC Group

http://homeenergypros.lbl.gov/

An ACI Initiative The Thousand Home

Challenge

Do Differently?

Buy American

Have energy audit with BPI-certified professional first (e.g., air seal attic prior to insulating)

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Travis Arnsparger, Climate Control, Fayetteville, PA (www.climatecontrolpa.com)

West Shore Windows and Doors, Mechanicsburg, PA (www.westshorewindows.com)

Advanced Solar Industries (ASI), Lancaster County, PA

Rosenberry Electric, Chambersburg, PA

Bill Mooney, Appalachian Energy of Gettysburg, PA (AppalachianEnergySystems@comcast.net)

Wade Martin, Waynesboro, PA (Radon mitigation)

Jon Kautz, Carlisle, Energy Smart Home Improvement, Boiling Springs, PA

J.K. Mechanical, Lancaster County, PA (eMonitor)

PA Code Inspection Services

The Borough of Chambersburg Master Electricians & Plumbing Inspections

Special thanks to the late Richard Sword, a true craftsman

It Takes a Team!

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Products & Systems Used1

Bryant Evolution Series heat pump – www.bryant.com

Park Avenue Windows – www.parkavenuewindows.com/

SunPower USA (PV) – www.Sunpower-usa.com

Heat Transfer Products, Solar Thermal Hot Water System – www.htproducts.com/solar.html

Fujitsu Ductless Heat Pump – www.fujitsugeneral.com/

Chevy Volt –

www.chevrolet.com/volt-electric-car/

eMonitor™ – www.powerhousedynamics.com/

34

1The inclusion of products & manufacturers on this list

should not be interpreted as an endorsement.

Access to Resources Affordable Comfort, Inc. (ACI) – www.affordablecomfort.org

Better Business Bureau – www.bbb.org

Building Science Corp. – www.buildingscience.com

Consumer Reports – www.ConsumerReports.org

DSIRE (Data Base of State Incentives for Renewable Energy) – www.dsireusa.org

Efficiency First – www.efficiencyfirst.org

Energy Star Most Efficient! www.energystar.gov/index.cfm?c=most_efficient.me_index

EPA Energy Star – www.energystar.gov

Keystone Help – www.keystonehelp.com

NREL (National Renewal Energy Laboratory) – www.nrel.gov

PA Home Energy – www.pahomeenergy.com

Thousand Home Challenge – www.ThousandHomeChallenge.org

Top Ten – www.toptenusa.org/

RMI (Rocky Mountain Institute) – www.rmi.org

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Bottom Line

Significant drop in CO2 emissions1

2005: 27, 797 lbs. 2011: 3,762 lbs.

Stimulate local economy: paying contractors & supporting local business

Great improvement - house & comfort

Impressive return on my investment

Greater resilience – hedge against uncertainty

36 1www.epa.gov/climatechange/emissions/ind_calculator.html

This project demonstrates that it is possible NOW to significantly reduce our dependence

on nonrenewable energy sources, create millions of green jobs, and protect future

generations from the devastating consequences of global climate change.

I am committed to the goal of achieving this by our nation’s 250th birthday celebration,

July 4, 2028 so we once again serve as a beacon of light and hope

to the rest of the world.

Wayne Mackey 37

Surprises??

Oops – radon! (Fixed)

Missed opportunities – Why didn’t more folks improve homes – energy efficiency & resilience with insurance $

We tend to take energy for granted

Really big reductions possible 38

For information contact:

Wayne Mackey

dmwm5261@comcast.net

REGISTER NOW! – www.acinational.org

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